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I have spent a lot of time over the years shooting non-weathersealed bodies in light or moderate rainfall and in moderate to heavy snowfall. . I have not worried about the cameras in those elements and don't bother doing anything to protect them.
The only time I ever had a problem was with my 5D Classic when the rainfall turned from moderate to heavy. . The camera kept glitching out in various ways. . In heavy rainfall I should have used something to protect the 5D, such as one of the little plastic bags they put your stuff in at Walmart. . But in light or moderate rainfall I haven't found it to be necessary. . The cameras keep working even thought there is water beading up on them and trickling off of them.
Most of these cameras stand up well in wet conditions, even the ones that are not at all weathersealed and even when you do nothing at all to try to protect them. . I think y'all worry too much.
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